immediately in press time, if required. To insure which, and at the same time to prevent any injury to the ammunition, Nos. 3, 4, &c. must not be allowed to take off their pouches, as they will be able to assist one another in preparing the ammunition, by only laying down their sticks; in taking up which again no time is lost. If the frame is fired with a lock, the same process is used, except that No. 1 primes and cocks, and No. 2 fires on receiving the word from No. 1. For ground firing, the upper part of this frame, consisting of the chamber and elevating stem, takes off from the legs, and the bottom of the stem being pointed like a picquet post, forms a very firm bouche a feù when stuck into the ground; the chamber at point blank being at a very good height for this practice, and capable of traversing in any direction. The exercise, in this case, is, of course, in other respects similar to that at high angles. [Illustration: _Plate 5_  Fig. 1  Fig. 2] THE MODE OF USING ROCKETS IN BOMBARDMENT. Plate 6, Fig. 1, represents the mode of carrying the bombarding frame and ammunition by men. The apparatus required is merely a light ladder, 12 feet in length, having two iron chambers, which are fixed on in preparing for action at the upper end of the ladder; from which chambers the Rockets are discharged, by means of a musket lock; the ladder being reared to any elevation, by two legs or pry-poles, as in Fig. 2. Every thing required for this service may be carried by men; or a Flanders-pattern ammunition waggon, with four horses, will convey 60 rounds of 32-pounder Carcasses, in ten boxes, eight of the boxes lying cross-ways on the floor of the waggon, and two length-ways, at top. On these the frame, complete for firing two Rockets at a flight, with spunges, &c. is laid; and the sticks on each side, to complete the stowage of all that is necessary, the whole being covered by the tilt. Four men only are required to be attached to each waggon, who are numbered 1, 2, 3, & 4.